Infineon BTM7742G High-Current PROFET™ Smart Switch for Automotive and Industrial Applications

The demand for robust, intelligent, and highly reliable power switching solutions is paramount in modern automotive and industrial systems. Addressing this need, Infineon Technologies introduces the BTM7742G, a standout member of the PROFET™ (Protected MOSFET) family of smart high-side switches. This device is engineered to deliver superior performance, diagnostic capabilities, and protection in the most demanding environments.

Designed for Extreme Load Control

The BTM7742G is a single-channel high-side switch capable of handling continuous currents up to 45 A. This high-current capability makes it an ideal solution for driving a wide array of high-power inductive and resistive loads, such as:

Automotive Applications: Heated seats, power windows, sunroofs, windshield heaters, and various pumps and motors.

Industrial Applications: Solenoid valves, motor controllers, and actuator drives in automation systems.

Its low typical on-state resistance (RDS(on)) ensures minimal power dissipation, leading to higher system efficiency and reduced thermal stress, which is critical for energy-sensitive and space-constrained designs.

Comprehensive Embedded Protection and Diagnostics

A key feature of the PROFET™ technology is its integrated intelligence. The BTM7742G is not just a switch; it is a comprehensive monitoring and protection unit. It includes a multitude of embedded features that safeguard both the switch itself and the load it controls:

Overload and Short-Circuit Protection: The device automatically limits the output current in case of a fault, preventing catastrophic failure.

Overvoltage Protection (including load-dump): Crucial for the harsh automotive electrical environment, it can handle voltage transients without damage.

Overtemperature Shutdown: The chip monitors its junction temperature and shuts down before critical levels are reached, restarting automatically once it has cooled.

Advanced Diagnostic Feedback: The device provides precise current sense feedback proportional to the load current. This enables the microcontroller to monitor the status of the load (e.g., detect open-load conditions, short-to-ground, or short-to-battery) and implement predictive maintenance strategies.

Enhanced Reliability and AEC-Q100 Compliance

For automotive applications, reliability is non-negotiable. The BTM7742G is qualified in accordance with AEC-Q100, meeting the stringent quality and reliability standards required for automotive electronics. Its robust design ensures operation in a wide temperature range and under the electrical noise typical in vehicles.

Conclusion and ICGOODFIND Summary

ICGOODFIND: The Infineon BTM7742G PROFET™ represents a pinnacle of integration and robustness in power switching. By combining a high-current output channel with a comprehensive suite of diagnostic and protection features, it significantly simplifies design-in, reduces external component count, and enhances overall system reliability. It is an exemplary solution for engineers developing next-generation automotive and industrial systems where performance, intelligence, and durability are critical.

Keywords:

1. PROFET™ Smart Switch

2. High-Current (45A)

3. Integrated Protection

4. Diagnostic Feedback

5. AEC-Q100 Qualified